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In a furious tweet posted after the sentencing, Steven said: "Time for @BorisJohnson to step up and get a handle on tougher sentencing! 10 years for killing my son and daughter and probably only serve 5! Justice was not served today. I am devastated, disgusted and appalled."

He's urged others to share his thoughts in a desperate plea for the Prime Minister to act.

In an emotional statement read out in court today, distraught Steven, from Margate, Kent, said: "I believe what happened here is an extreme version of her character. Like a tantrum. She knew it was the ultimate punishment.

The twins were just 23-months-old when they died (Image: Steven Ford / SWNS)